kubeadm support (#1631)

* kubeadm support

* move k8s master to a subtask
* disable k8s secrets when using kubeadm
* fix etcd cert serial var
* move simple auth users to master role
* make a kubeadm-specific env file for kubelet
* add non-ha CI job

* change ci boolean vars to json format

* fixup

* Update create-gce.yml

* Update create-gce.yml

* Update create-gce.yml

library/kube.py

@@ -135,12 +135,15 @@ class KubeManager(object):
             return None
         return out.splitlines()
 
-    def create(self, check=True):
+    def create(self, check=True, force=True):
         if check and self.exists():
             return []
 
         cmd = ['apply']
 
+        if force:
+            cmd.append('--force')
+
         if not self.filename:
             self.module.fail_json(msg='filename required to create')
 
@@ -148,11 +151,11 @@ class KubeManager(object):
 
         return self._execute(cmd)
 
-    def replace(self):
+    def replace(self, force=True):
 
         cmd = ['apply']
 
-        if self.force:
+        if force:
             cmd.append('--force')
 
         if not self.filename: